ML20062C169
| ML20062C169 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 07/29/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8208050183 | |
| Download: ML20062C169 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY CH ATTANOOGA, TENNESSEE 374ol 400 Chestnut Street Tower II July 29, 1982 M
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,a U.S. Nuclear Regulatory Commission
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Region II j
Attn:
Mr. James P. O'Reilly, Regional Administrator C
101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - EMBEDDED PIPING WITH CRUSHABLE INSULATION - BLRD-50-438/82-47, BLRD-50-439/82 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector J. D. Wilcox on June 29, 1982 in accordance with 10 CFR 50.55(e) as NCR BLN CEB 8209. Enclosed is our first interim report. We expect to submit our next report by January 14, 1983 If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY D6 L.
M,. Mills, Manager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555
.j/bjU146 Colt 8208050183 820729 PDR ADOCK 05000438
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An Equal Opportunity Employer
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,e ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 EMBEDDED PIPING WITH CRUSHABLE INSULATION NCR BLN CEB 8209 BLRD-50-438/82-47, BLRD-50-439/82-42 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency Essential raw cooling water piping problem N4-0KE-P was analyzed assuming the 36-inch pipe to be embedded in concrete at two locations. Based on this information, the analysis assumption was that the pipe was anchored at the two locations. Actually, the 36-inch pipe has 3 inches of crushable insulation covering the area of embedment. Since the insulation may crush, the pipe is not truly anchored at the two locations. Therefore, the analysis is unconservative and must be revised assuming limited restraints instead of anchors.
Interim Progress A preliminary analysis has been performed using limited restraints at the two locations. The analysis results required the removal and relocation of some supports and the rerouting of piping to allow for the thermal growth. This information has been sent to Bellefonte Design Project (BLP) for review of the suggested locations of the rerouted piping. Final reanalysis will be rescheduled upon receiving BLP's response.
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